Alternating current apparatus



Jan. 25,1938. A. V. P.ETERSEN Jan, 25, 1938. A. V. PETERSEN 2,106,556

ALTBRNATING oURRENT APPARATUS Filed Feb. 27, 1937 2 Sheetssheet 2 ofsaid first moving coil and of said unknoWn Teactance.

7. n anaIternotingcuTrent def1ectional in StruIT1ent, a pTinlary circuitincluding a pTin1ary Winding for connection to SOuce of fLxed a1ternating-curent voltage, and a secondary circuit including in SeTieS aSecondary winding, 84 1e acance and a rnoving coil, said secondaTy dnding and said Inoving coil being nagneticaHy cou pled to Said prin1aTyWinding, the current thTough said reactance and Said noving coil beingonly that induced by Said pnmary nding, WheTeby the denection of saidn1oving ooil is in proportion to the value of Said reactance and isindependent of the ohInic resistance of Said reactance.

8. n an a1ternatingcnrTent deectiona1 in stnln1ent, a rhnar circuitincludin a prin1ary vinding fo1 connecton to a xed aternatingcur Tentsupply 11ne a Secondary circuit including in SeieS a secondary Winding,8 reactance subect to variation and a n10ving ooil, Said Secondaryvvinding and Said Inoving coi1 being nagneticaHy coupled t() SaidpriInary Winding, the current through Said reactance and said n1ovingooil being

